Package org.apache.jmeter.engine.util

Source Code of org.apache.jmeter.engine.util.ValueReplacer

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/

package org.apache.jmeter.engine.util;

import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.apache.jmeter.functions.InvalidVariableException;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jmeter.testelement.TestPlan;
import org.apache.jmeter.testelement.property.JMeterProperty;
import org.apache.jmeter.testelement.property.MultiProperty;
import org.apache.jmeter.testelement.property.PropertyIterator;
import org.apache.jmeter.testelement.property.StringProperty;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

/**
* Perfom replacement of ${variable} references.
*/
public class ValueReplacer {
    private static final Logger log = LoggingManager.getLoggerForClass();

    private final CompoundVariable masterFunction = new CompoundVariable();

    private Map<String, String> variables = new HashMap<String, String>();

    public ValueReplacer() {
    }

    public ValueReplacer(TestPlan tp) {
        setUserDefinedVariables(tp.getUserDefinedVariables());
    }

    boolean containsKey(String k){
        return variables.containsKey(k);
    }

    public void setUserDefinedVariables(Map<String, String> variables) {
        this.variables = variables;
    }

    public void replaceValues(TestElement el) throws InvalidVariableException {
        Collection<JMeterProperty> newProps = replaceValues(el.propertyIterator(), new ReplaceStringWithFunctions(masterFunction,
                variables));
        setProperties(el, newProps);
    }

    private void setProperties(TestElement el, Collection<JMeterProperty> newProps) {
        el.clear();
        Iterator<JMeterProperty> iter = newProps.iterator();
        while (iter.hasNext()) {
            el.setProperty(iter.next());
        }
    }

    public void reverseReplace(TestElement el) throws InvalidVariableException {
        Collection<JMeterProperty> newProps = replaceValues(el.propertyIterator(), new ReplaceFunctionsWithStrings(masterFunction,
                variables));
        setProperties(el, newProps);
    }

    public void reverseReplace(TestElement el, boolean regexMatch) throws InvalidVariableException {
        Collection<JMeterProperty> newProps = replaceValues(el.propertyIterator(), new ReplaceFunctionsWithStrings(masterFunction,
                variables, regexMatch));
        setProperties(el, newProps);
    }

    public void undoReverseReplace(TestElement el) throws InvalidVariableException {
        Collection<JMeterProperty> newProps = replaceValues(el.propertyIterator(), new UndoVariableReplacement(masterFunction,
                variables));
        setProperties(el, newProps);
    }

    public void addVariable(String name, String value) {
        variables.put(name, value);
    }

    /**
     * Add all the given variables to this replacer's variables map.
     *
     * @param vars
     *            A map of variable name-value pairs (String-to-String).
     */
    public void addVariables(Map<String, String> vars) {
        variables.putAll(vars);
    }

    private Collection<JMeterProperty> replaceValues(PropertyIterator iter, ValueTransformer transform) throws InvalidVariableException {
        List<JMeterProperty> props = new LinkedList<JMeterProperty>();
        while (iter.hasNext()) {
            JMeterProperty val = iter.next();
            if (log.isDebugEnabled()) {
                log.debug("About to replace in property of type: " + val.getClass() + ": " + val);
            }
            if (val instanceof StringProperty) {
                // Must not convert TestElement.gui_class etc
                if (!val.getName().equals(TestElement.GUI_CLASS) &&
                        !val.getName().equals(TestElement.TEST_CLASS)) {
                    val = transform.transformValue(val);
                    if (log.isDebugEnabled()) {
                        log.debug("Replacement result: " + val);
                    }
                }
            } else if (val instanceof MultiProperty) {
                MultiProperty multiVal = (MultiProperty) val;
                Collection<JMeterProperty> newValues = replaceValues(multiVal.iterator(), transform);
                multiVal.clear();
                Iterator<JMeterProperty> propIter = newValues.iterator();
                while (propIter.hasNext()) {
                    multiVal.addProperty(propIter.next());
                }
                if (log.isDebugEnabled()) {
                    log.debug("Replacement result: " + multiVal);
                }
            } else {
                if (log.isDebugEnabled()) {
                    log.debug("Won't replace " + val);
                }
            }
            props.add(val);
        }
        return props;
    }
}
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